// JSON.js
// For JSON functions.
// FZ, Copyright (c) 2010 Zlongames 

(function()
{
    
FZ.JSON = {
	parse: function (text, reviver) {
		var j;
		function walk(holder, key) {
			var k, v, value = holder[key];
			if (value && typeof value === 'object') {
				for (k in value) {
					if (Object.hasOwnProperty.call(value, k)) {
						v = walk(value, k);
						if (v !== undefined) {
							value[k] = v;
						} else {
							delete value[k];
						}
					}
				}
			}
			return reviver.call(holder, key, value);
		}
		text = String(text);
		cx.lastIndex = 0;
		if (cx.test(text)) {
			text = text.replace(cx, function (a) {
				return '\\u' +
					('0000' + a.charCodeAt(0).toString(16)).slice(-4);
			});
		}
		if (/^[\],:{}\s]*$/.
test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
			j = eval('(' + text + ')');
			return typeof reviver === 'function' ?
				walk({'': j}, '') : j;
		}
		throw new SyntaxError('JSON.parse');
	},
	stringify: function(value, replacer, space){
		var i;
		gap = '';
		indent = '';
		if (typeof space === 'number') {
			for (i = 0; i < space; i += 1) {
				indent += ' ';
			}
		} else if (typeof space === 'string') {
			indent = space;
		}
		rep = replacer;
		if (replacer && typeof replacer !== 'function' &&
				(typeof replacer !== 'object' ||
				typeof replacer.length !== 'number')) {
			throw new Error('JSON.stringify');
		}
		return str('', {'': value});
	}
};

function quote(string) {
	escapable.lastIndex = 0;
	return escapable.test(string) ?
		'"' + string.replace(escapable, function (a) {
			var c = meta[a];
			return typeof c === 'string' ? c :
				'\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
			}) + '"' :
		'"' + string + '"';
}

function str(key, holder) {
	var i,
		k,
		v,
		length,
		mind = gap,
		partial,
		value = holder[key];
	if (value && typeof value === 'object' &&
			typeof value.toJSON === 'function') {
		value = value.toJSON(key);
	}
	if (typeof rep === 'function') {
		value = rep.call(holder, key, value);
	}
	switch (typeof value) {
		case 'string':
			return quote(value);
		case 'number':
			return isFinite(value) ? String(value) : 'null';
		case 'boolean':
		case 'null':
			return String(value);
		case 'object':
			if (!value) {
				return 'null';
			}
			gap += indent;
			partial = [];
			if (Object.prototype.toString.apply(value) === '[object Array]') {
				length = value.length;
				for (i = 0; i < length; i += 1) {
					partial[i] = str(i, value) || 'null';
				}
				v = partial.length === 0 ? '[]' :
					gap ? '[\n' + gap +
						partial.join(',\n' + gap) + '\n' +
							mind + ']' :
						'[' + partial.join(',') + ']';
					gap = mind;
					return v;
			}
			if (rep && typeof rep === 'object') {
				length = rep.length;
				for (i = 0; i < length; i += 1) {
					k = rep[i];
					if (typeof k === 'string') {
						v = str(k, value);
						if (v) {
							partial.push(quote(k) + (gap ? ': ' : ':') + v);
						}
					}
				}
			} else {
				for (k in value) {
					if (Object.hasOwnProperty.call(value, k)) {
						v = str(k, value);
						if (v) {
							partial.push(quote(k) + (gap ? ': ' : ':') + v);
						}
					}
				}
			}
			v = partial.length === 0 ? '{}' :
				gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' +
					mind + '}' : '{' + partial.join(',') + '}';
			gap = mind;
			return v;
	}
}

var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        gap,
        indent,
        meta = {    // table of character substitutions
            '\b': '\\b',
            '\t': '\\t',
            '\n': '\\n',
            '\f': '\\f',
            '\r': '\\r',
            '"' : '\\"',
            '\\': '\\\\'
        },
        rep;

function f(n) {
	return n < 10 ? '0' + n : n;
}

if (typeof Date.prototype.toJSON !== 'function') {
	Date.prototype.toJSON = function (key) {
		return isFinite(this.valueOf()) ?
			this.getUTCFullYear()   + '-' +
			f(this.getUTCMonth() + 1) + '-' +
			f(this.getUTCDate())      + 'T' +
			f(this.getUTCHours())     + ':' +
			f(this.getUTCMinutes())   + ':' +
			f(this.getUTCSeconds())   + 'Z' : null;
	};
	String.prototype.toJSON =
	Number.prototype.toJSON =
	Boolean.prototype.toJSON = function (key) {
		return this.valueOf();
	};
}

})();